I love how much attention Flathub is putting into app metadata guidelines.
I see a lot of problems when looking for software in software centres. App icons and app screenshots that make the software appear like 2005 abandonware, gaudy non-standard theming in screenshots on app listings, incomplete descriptions, stupidly long app names that read like a whole sentence, etc.
In fairness, you go onto the Windows store and it's the exact same. But my god, the Windows store is awful, so that's not what we should have our eyes on.
I dislike Apple and don't intend to own any of their products, but one thing they do well is forcing high quality listings on their app stores.
Flathub is sensibly trying to emulate that (though with gentle nudges as opposed to enforced terms), and I'm grateful they're doing that work, because it's important.